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Outer radius of a circular path is 35 cm. Inner radius of the same path is 21 cm. What is the area of this circular path ?
1. 2085 cm2
2. 2464 cm2
3. 3246 cm2
4. 2535 cm2

1 Answer

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Best answer
Correct Answer - Option 2 : 2464 cm2

Given 

Outer radius of circular path = 35 cm

Inner radius of circular path = 21 cm 

Formula Used 

Area of circular path = π(R2o - R2i)

Calculation 

Area of circular path = 22/7 × (352 - 212

⇒ 22/7 × 56 × 14 = 2464 cm2

∴ The area of circular path is 2464 cm2

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